{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "OBJECTIVE : Diabetic nephropathy is one of the major causes of renal failure , which is accompanied by the production of reactive oxygen species ( ROS ) ."}
{"Chemical": ["oxygen"], "Disease": ["Diabetic nephropathy", "renal failure"]}